Prop.



J. MOUNIER'.

PROP.

APPLICATION FILED .APB..24, 1908.

Patented Mar. 7,1911.

IIIJ

JOSEPH 'MOUNIER 0F ST. ETIENNE, LOIRE, FRANCE.

PROP.

Speccaton of Letters Patent.l

Patented Mar." '7, 1911.

Application med April aereos. serial No. 428,931.

' 68 Rue Michelet, St. Etienne, Loire, France,

. transverse-sectional view on line lthrough the line B-B of Fig.

engineer, have invented a new and useful Improvement in Props, which improvement is fully set forth in the following specification. V

This invention has for its object a metal post which is capable of resisting considerable 'pressure and is constructed in such a manner that it can be transported in light parts which can be easily put together on the spot at which it is to be used. Furthermore it can be easily adjusted tothe height d`e.

sired and-as easily removed, whatever may be the pressure it supports.

Figure 1 shows a sectional elevation taken through the center of a post; Fig. 2 is a A-A of Fig. 1v; Fig.-3 is a view at a right angle to Fig. 1 of parts of the lifting device of the upperpart of the post; Fig. 4; is a longi tudlnal section of a modification of the channel for the shot; Fig. 5 is a longitudinal section of a modification in the construction of thepost; Fig. 6 is a transverse section 5; and Fig. 7 is a transverse section through the line C-G of Fig. 5. A

The post, las shown in Figs. 1 and Q, consists oftwo metal tubes a and I), sliding one within the other. The outer member or tube a is provided in its base with a cavity a and with a valve or cock z' controlling a channel a2 leading to said cavity from the interspace a3 beneath the lower end of Vthe inner member or tube b. The tube b is provided in its upper portion with an interior chamber b adapted to contain a resistance mass m composed of mobile units such as cast iron shot or steel balls, and in its lower end with a channel 0 which is formed so as to allow the shot or balls to pass freely by gravity from the chamber in the tube b, under this tube into the interspace a3 comprised between said tube and the cock z' but not to pass in the reverse direction against gravity. The inner tube, b, is supported by the balls' or shot and the height of the prop will be determined, of course, by admitting a greater or less quantity of the shot under the lower end of the said inner tube which will rest on the shot as shown in Fig. 1. The shot is caused to pass under the lower end of the inner tube by merely lifting the lend of the outer tube.

tube, whereupon it will flow by gravity to the space belowthe tube. When the post is to be removed, the cock 21 is turned so as to permit the balls or shot to flow to the lower The inner tube will be thereby caused to ydescend within the outer tube thus shortening'the post to a convenient length for transportation. The lengthening of the post may be effected by means ofthe lever :c pivotally mounted on the upper part of the bar s between the shoulders lu w. The bar s preferably slides in a collar or sleeve r, and is provided with a rack t engaging with a pawlu arranged on said collar or sleeve fr'. or free end of the lever :c is swung upward, the inner forked end of the same rocks on the pins y on the tube b as a fulcrum'so that the rack s is raised and it willbe held in its raised position by the pawl u. Consequently, on the down stroke of the lever the rack s will constitute the fulcrum and the tube b will be lifted.

Instead of forming the channel 0 as in Fig. 1,. it may be formed as in 01, Fig. 4.

A modification of the post is shown in Figs. 5 to 7. The balls in this form of the invention are not contained in the tube Z) but are disposed in an enlargement of the upper part of the tube a. A channel d is provided in the wall of said tube communi- When the outer eating with the chamber below the end of the tube b. A sliding cock e is arranged across the channel and has a beveled end so as to allow the balls to fall easily but not to pass when the cock is pushed in. The cock i in this instance is also slidably arranged.

The forms of construction illustrated in the drawings are only intended to give an idea in what manner my invention may be realized, but I do not limit myself to theseV i proportionately to the sinking of the upper member into the lower member.

2. A mine prop comprising a lower tubular member, an inclosed granular charge,

`.lar member, an inclosed granular charge,

an' upper tubular member telescoped by the lower member, and a series of superposed braces Awithin the upper member adapted to successively enter the charge.

,3. A mine prop comprising a lower tubuan upper telescoped tubular member vadapted to be sustained bysaid charge, a hollow foot supporting the lower member, and means for establishing communication between the lower member and said foot.

4. A mine prop comprising a lower tubular member having lower outletopenings, a granular charge witl1in said member, an upper telescoped tubular member adapted to be sustained by said charge, a ho-llow foot supporting the lower member and having inlet sbpenings, and a valve adapted` to establish communication between` the out-letV openings and the inlet openings.

5. A post comprismg two relatively mov- "able members separated by an interspace,

one of the members containing va chamber above the interspace and connected therewith by an open channel, and a resistance mass composed of hard mobile units within the chamber, whereby as the members are separated the resistance mass-will flow b gravity to the interspace and hold the members apart.

6. A post comprising two relatively movable members separated by an interspace, one of the members containing 'a chamber above the interspace and connected therewith by a channel, a resist-ance mass composed of hard mobile units within the chamber, whereby as the members are separa-ted the resistance mass will flow by gravityfto the interspace and hold the ymembers apart, and an open valved outlet channel extending downward-from the inter-space.

7. A post comprising ajpairof telescoping members separated `by an interspace 'beneath the lower end of the inner member, one of the members containing a chamber above the interspace and connected therewith by an Openchannel, and a resistance mass composed of, hard mobile units vwithin the chamber, whereby as t-he inner member is lifted vthe resistance massffwill owby. gravity to the interspace and support'the mner member, and a valved outlet channel extending downwardly, from the linterspace whereby the interspace may be freed of the resistance mass'to lower the inner member. 8. A post comprising a pair of telescoping members separa-ted by an interspace below the lower end of the inner Ymember, the inner member chambered'out internally and having a constricted open channel leading through its lower end to the interspace, an a resistance mass composed of hard mobile units within the chamber in the-inner member.

9. A post comprising a pair of telescopng -members separated by an interspace below the lower end of the inner member, the inner member chambered out internally and having a restricted open channel leadinv through its lower end to the interspace, an the outer member providedwith a'valved channel. lea'dingdownward from the interspace, and a resistance mass composed of hard mobile units within the the inner member.

l0. Apost comprising a pair of telescoping members separated by an interspace below chamber in the lower end of the-.inner member, the inner member chambered out internally and having'v a constricted open vchannel leading through itslower end to the interspace, a resistance mass composed of hard mobile units within the chamber in the inner member, and .means to lift the inner member relative to the outer member.-

ll, A post comprising a pair of telescoping members separated by an interspace below the lower end of the inner member, the inner member chambered out internally and having a restricted open channel leading through its lower end Lto the interspace, a resistance mass composed of hard mobile units within the chamber in the inner member,` in combination with a rack slidably mounted on the outer member, a pawl on the 'said member engaging the rack, and a lever pivotally mounted on the rack and `pivotally engaging the inner member.

In testimony whereof I have signed this specification 1n the presence offtwo subscribing witnesses..

y y MoUmER. v

Witnesses;

EDMoND A. BURRILL,

A. MoUNmR. Y

Vloo 

